- Born
- 1941-11-23 in Tokyo, Japan, Japan
- Hand
- Right
- Backhand
- nan
- Coach
- nan
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Isao Watanabe
Isao WatanabeIsao Watanabe has found the Tour difficult, recording 4–6 across 10 matches (40.0%). The numbers point to a player still building their Tour presence — a key area of opportunity going forward.
Best season: 1968 — 3–4 (42.9%) from 7 matches. The best single-season display to date — a useful reference point as the career continues to develop.
| Date | Tournament | Srf | Rd | Wrk | Winner | Lrk | Loser | Score |
|---|---|---|---|---|---|---|---|---|
| 1974-10-07 | Tokyo-2 | Clay | R32 | 51 | 289 | 7-5 6-1 | ||
| 1974-04-08 | Tokyo WCT | Hard | R32 | 139 | - | 5-7 6-2 6-1 | ||
| 1970-03-14 | Davis Cup G2 QF: HKG vs JPN | - | RR | - | - | 6-0 6-0 6-2 | ||
| 1968-08-05 | Hamburg | Clay | R64 | - | - | 6-0 6-3 7-5 | ||
| 1968-07-22 | Hilversum | Clay | R16 | - | - | 6-1 6-1 | ||
| 1968-07-22 | Hilversum | Clay | R32 | - | - | 6-0 6-4 | ||
| 1968-07-22 | Hilversum | Clay | R64 | - | - | 6-4 6-1 | ||
| 1968-07-15 | Gstaad | Clay | R32 | - | - | 6-8 7-5 6-3 | ||
| 1968-06-10 | Bristol | Grass | R16 | - | - | 3-6 6-3 7-5 | ||
| 1968-06-10 | Bristol | Grass | R32 | - | - | 3-6 6-3 6-3 |
